mirror of
https://github.com/PaperMC/Paper.git
synced 2024-12-27 11:27:35 +01:00
Move anti xray classes to source
This commit is contained in:
stonar96
Nassim Jahnke
parent
f8cb014d20
commit
002b02c273
@ -0,0 +1,51 @@
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package io.papermc.paper.antixray;
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public final class BitStorageReader {
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private byte[] buffer;
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private int bits;
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private int mask;
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private int longInBufferIndex;
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private int bitInLongIndex;
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private long current;
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public void setBuffer(byte[] buffer) {
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this.buffer = buffer;
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}
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public void setBits(int bits) {
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this.bits = bits;
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mask = (1 << bits) - 1;
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}
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public void setIndex(int index) {
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longInBufferIndex = index;
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bitInLongIndex = 0;
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init();
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}
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private void init() {
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if (buffer.length > longInBufferIndex + 7) {
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current = ((((long) buffer[longInBufferIndex]) << 56)
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| (((long) buffer[longInBufferIndex + 1] & 0xff) << 48)
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| (((long) buffer[longInBufferIndex + 2] & 0xff) << 40)
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| (((long) buffer[longInBufferIndex + 3] & 0xff) << 32)
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| (((long) buffer[longInBufferIndex + 4] & 0xff) << 24)
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| (((long) buffer[longInBufferIndex + 5] & 0xff) << 16)
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| (((long) buffer[longInBufferIndex + 6] & 0xff) << 8)
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| (((long) buffer[longInBufferIndex + 7] & 0xff)));
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}
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}
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public int read() {
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if (bitInLongIndex + bits > 64) {
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bitInLongIndex = 0;
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longInBufferIndex += 8;
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init();
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}
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int value = (int) (current >>> bitInLongIndex) & mask;
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bitInLongIndex += bits;
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return value;
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}
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}
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@ -0,0 +1,79 @@
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package io.papermc.paper.antixray;
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public final class BitStorageWriter {
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private byte[] buffer;
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private int bits;
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private long mask;
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private int longInBufferIndex;
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private int bitInLongIndex;
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private long current;
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private boolean dirty;
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public void setBuffer(byte[] buffer) {
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this.buffer = buffer;
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}
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public void setBits(int bits) {
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this.bits = bits;
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mask = (1L << bits) - 1;
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}
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public void setIndex(int index) {
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longInBufferIndex = index;
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bitInLongIndex = 0;
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init();
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}
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private void init() {
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if (buffer.length > longInBufferIndex + 7) {
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current = ((((long) buffer[longInBufferIndex]) << 56)
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| (((long) buffer[longInBufferIndex + 1] & 0xff) << 48)
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| (((long) buffer[longInBufferIndex + 2] & 0xff) << 40)
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| (((long) buffer[longInBufferIndex + 3] & 0xff) << 32)
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| (((long) buffer[longInBufferIndex + 4] & 0xff) << 24)
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| (((long) buffer[longInBufferIndex + 5] & 0xff) << 16)
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| (((long) buffer[longInBufferIndex + 6] & 0xff) << 8)
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| (((long) buffer[longInBufferIndex + 7] & 0xff)));
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}
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dirty = false;
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}
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public void flush() {
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if (dirty && buffer.length > longInBufferIndex + 7) {
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buffer[longInBufferIndex] = (byte) (current >> 56 & 0xff);
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buffer[longInBufferIndex + 1] = (byte) (current >> 48 & 0xff);
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buffer[longInBufferIndex + 2] = (byte) (current >> 40 & 0xff);
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buffer[longInBufferIndex + 3] = (byte) (current >> 32 & 0xff);
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buffer[longInBufferIndex + 4] = (byte) (current >> 24 & 0xff);
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buffer[longInBufferIndex + 5] = (byte) (current >> 16 & 0xff);
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buffer[longInBufferIndex + 6] = (byte) (current >> 8 & 0xff);
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buffer[longInBufferIndex + 7] = (byte) (current & 0xff);
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}
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}
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public void write(int value) {
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if (bitInLongIndex + bits > 64) {
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flush();
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bitInLongIndex = 0;
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longInBufferIndex += 8;
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init();
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}
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current = current & ~(mask << bitInLongIndex) | (value & mask) << bitInLongIndex;
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dirty = true;
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bitInLongIndex += bits;
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}
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public void skip() {
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bitInLongIndex += bits;
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if (bitInLongIndex > 64) {
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flush();
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bitInLongIndex = bits;
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longInBufferIndex += 8;
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init();
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}
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}
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}
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@ -0,0 +1,45 @@
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package io.papermc.paper.antixray;
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import net.minecraft.core.BlockPos;
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import net.minecraft.core.Direction;
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import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
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import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
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import net.minecraft.server.level.ServerPlayer;
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import net.minecraft.server.level.ServerPlayerGameMode;
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import net.minecraft.world.level.ChunkPos;
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import net.minecraft.world.level.Level;
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import net.minecraft.world.level.block.state.BlockState;
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import net.minecraft.world.level.chunk.LevelChunk;
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public class ChunkPacketBlockController {
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public static final ChunkPacketBlockController NO_OPERATION_INSTANCE = new ChunkPacketBlockController();
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protected ChunkPacketBlockController() {
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}
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public BlockState[] getPresetBlockStates(Level level, ChunkPos chunkPos, int chunkSectionY) {
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return null;
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}
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public boolean shouldModify(ServerPlayer player, LevelChunk chunk) {
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return false;
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}
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public ChunkPacketInfo<BlockState> getChunkPacketInfo(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk) {
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return null;
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}
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public void modifyBlocks(ClientboundLevelChunkWithLightPacket chunkPacket, ChunkPacketInfo<BlockState> chunkPacketInfo) {
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chunkPacket.setReady(true);
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}
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public void onBlockChange(Level level, BlockPos blockPos, BlockState newBlockState, BlockState oldBlockState, int flags, int maxUpdateDepth) {
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}
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public void onPlayerLeftClickBlock(ServerPlayerGameMode serverPlayerGameMode, BlockPos blockPos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight, int sequence) {
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}
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}
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@ -0,0 +1,676 @@
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package io.papermc.paper.antixray;
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import io.papermc.paper.configuration.WorldConfiguration;
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import io.papermc.paper.configuration.type.EngineMode;
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import java.util.ArrayList;
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import java.util.LinkedHashSet;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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import java.util.concurrent.Executor;
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import java.util.concurrent.ThreadLocalRandom;
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import java.util.function.IntSupplier;
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import net.minecraft.core.BlockPos;
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import net.minecraft.core.Direction;
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import net.minecraft.core.registries.Registries;
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import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
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import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
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import net.minecraft.server.MinecraftServer;
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import net.minecraft.server.level.ServerLevel;
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import net.minecraft.server.level.ServerPlayer;
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import net.minecraft.server.level.ServerPlayerGameMode;
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import net.minecraft.world.level.ChunkPos;
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import net.minecraft.world.level.Level;
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import net.minecraft.world.level.biome.Biomes;
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import net.minecraft.world.level.block.Block;
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import net.minecraft.world.level.block.Blocks;
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import net.minecraft.world.level.block.EntityBlock;
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import net.minecraft.world.level.block.state.BlockState;
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import net.minecraft.world.level.chunk.EmptyLevelChunk;
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import net.minecraft.world.level.chunk.GlobalPalette;
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import net.minecraft.world.level.chunk.LevelChunk;
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import net.minecraft.world.level.chunk.LevelChunkSection;
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import net.minecraft.world.level.chunk.MissingPaletteEntryException;
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import net.minecraft.world.level.chunk.Palette;
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import org.bukkit.Bukkit;
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public final class ChunkPacketBlockControllerAntiXray extends ChunkPacketBlockController {
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private static final Palette<BlockState> GLOBAL_BLOCKSTATE_PALETTE = new GlobalPalette<>(Block.BLOCK_STATE_REGISTRY);
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private static final LevelChunkSection EMPTY_SECTION = null;
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private final Executor executor;
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private final EngineMode engineMode;
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private final int maxBlockHeight;
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private final int updateRadius;
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private final boolean usePermission;
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private final BlockState[] presetBlockStates;
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private final BlockState[] presetBlockStatesFull;
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private final BlockState[] presetBlockStatesStone;
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private final BlockState[] presetBlockStatesDeepslate;
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private final BlockState[] presetBlockStatesNetherrack;
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private final BlockState[] presetBlockStatesEndStone;
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private final int[] presetBlockStateBitsGlobal;
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private final int[] presetBlockStateBitsStoneGlobal;
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private final int[] presetBlockStateBitsDeepslateGlobal;
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private final int[] presetBlockStateBitsNetherrackGlobal;
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private final int[] presetBlockStateBitsEndStoneGlobal;
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private final boolean[] solidGlobal = new boolean[Block.BLOCK_STATE_REGISTRY.size()];
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private final boolean[] obfuscateGlobal = new boolean[Block.BLOCK_STATE_REGISTRY.size()];
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private final LevelChunkSection[] emptyNearbyChunkSections = {EMPTY_SECTION, EMPTY_SECTION, EMPTY_SECTION, EMPTY_SECTION};
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private final int maxBlockHeightUpdatePosition;
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public ChunkPacketBlockControllerAntiXray(Level level, Executor executor) {
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this.executor = executor;
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WorldConfiguration.Anticheat.AntiXray paperWorldConfig = level.paperConfig().anticheat.antiXray;
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engineMode = paperWorldConfig.engineMode;
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maxBlockHeight = paperWorldConfig.maxBlockHeight >> 4 << 4;
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updateRadius = paperWorldConfig.updateRadius;
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usePermission = paperWorldConfig.usePermission;
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List<Block> toObfuscate;
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if (engineMode == EngineMode.HIDE) {
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toObfuscate = paperWorldConfig.hiddenBlocks;
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presetBlockStates = null;
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presetBlockStatesFull = null;
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presetBlockStatesStone = new BlockState[]{Blocks.STONE.defaultBlockState()};
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presetBlockStatesDeepslate = new BlockState[]{Blocks.DEEPSLATE.defaultBlockState()};
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presetBlockStatesNetherrack = new BlockState[]{Blocks.NETHERRACK.defaultBlockState()};
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presetBlockStatesEndStone = new BlockState[]{Blocks.END_STONE.defaultBlockState()};
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presetBlockStateBitsGlobal = null;
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presetBlockStateBitsStoneGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.STONE.defaultBlockState())};
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presetBlockStateBitsDeepslateGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.DEEPSLATE.defaultBlockState())};
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presetBlockStateBitsNetherrackGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.NETHERRACK.defaultBlockState())};
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presetBlockStateBitsEndStoneGlobal = new int[]{GLOBAL_BLOCKSTATE_PALETTE.idFor(Blocks.END_STONE.defaultBlockState())};
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} else {
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toObfuscate = new ArrayList<>(paperWorldConfig.replacementBlocks);
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List<BlockState> presetBlockStateList = new LinkedList<>();
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for (Block block : paperWorldConfig.hiddenBlocks) {
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if (!(block instanceof EntityBlock)) {
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toObfuscate.add(block);
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presetBlockStateList.add(block.defaultBlockState());
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}
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}
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// The doc of the LinkedHashSet(Collection<? extends E>) constructor doesn't specify that the insertion order is the predictable iteration order of the specified Collection, although it is in the implementation
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Set<BlockState> presetBlockStateSet = new LinkedHashSet<>();
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// Therefore addAll(Collection<? extends E>) is used, which guarantees this order in the doc
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presetBlockStateSet.addAll(presetBlockStateList);
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presetBlockStates = presetBlockStateSet.isEmpty() ? new BlockState[]{Blocks.DIAMOND_ORE.defaultBlockState()} : presetBlockStateSet.toArray(new BlockState[0]);
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presetBlockStatesFull = presetBlockStateSet.isEmpty() ? new BlockState[]{Blocks.DIAMOND_ORE.defaultBlockState()} : presetBlockStateList.toArray(new BlockState[0]);
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presetBlockStatesStone = null;
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presetBlockStatesDeepslate = null;
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presetBlockStatesNetherrack = null;
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presetBlockStatesEndStone = null;
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presetBlockStateBitsGlobal = new int[presetBlockStatesFull.length];
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for (int i = 0; i < presetBlockStatesFull.length; i++) {
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presetBlockStateBitsGlobal[i] = GLOBAL_BLOCKSTATE_PALETTE.idFor(presetBlockStatesFull[i]);
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}
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presetBlockStateBitsStoneGlobal = null;
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presetBlockStateBitsDeepslateGlobal = null;
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presetBlockStateBitsNetherrackGlobal = null;
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presetBlockStateBitsEndStoneGlobal = null;
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}
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for (Block block : toObfuscate) {
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// Don't obfuscate air because air causes unnecessary block updates and causes block updates to fail in the void
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if (block != null && !block.defaultBlockState().isAir()) {
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// Replace all block states of a specified block
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for (BlockState blockState : block.getStateDefinition().getPossibleStates()) {
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obfuscateGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(blockState)] = true;
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}
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}
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}
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EmptyLevelChunk emptyChunk = new EmptyLevelChunk(level, new ChunkPos(0, 0), MinecraftServer.getServer().registryAccess().lookupOrThrow(Registries.BIOME).getOrThrow(Biomes.PLAINS));
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BlockPos zeroPos = new BlockPos(0, 0, 0);
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for (int i = 0; i < solidGlobal.length; i++) {
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BlockState blockState = GLOBAL_BLOCKSTATE_PALETTE.valueFor(i);
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if (blockState != null) {
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solidGlobal[i] = blockState.isRedstoneConductor(emptyChunk, zeroPos)
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&& blockState.getBlock() != Blocks.SPAWNER && blockState.getBlock() != Blocks.BARRIER && blockState.getBlock() != Blocks.SHULKER_BOX && blockState.getBlock() != Blocks.SLIME_BLOCK && blockState.getBlock() != Blocks.MANGROVE_ROOTS || paperWorldConfig.lavaObscures && blockState == Blocks.LAVA.defaultBlockState();
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// Comparing blockState == Blocks.LAVA.defaultBlockState() instead of blockState.getBlock() == Blocks.LAVA ensures that only "stationary lava" is used
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// shulker box checks TE.
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}
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}
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maxBlockHeightUpdatePosition = maxBlockHeight + updateRadius - 1;
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}
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private int getPresetBlockStatesFullLength() {
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return engineMode == EngineMode.HIDE ? 1 : presetBlockStatesFull.length;
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}
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@Override
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public BlockState[] getPresetBlockStates(Level level, ChunkPos chunkPos, int chunkSectionY) {
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// Return the block states to be added to the paletted containers so that they can be used for obfuscation
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int bottomBlockY = chunkSectionY << 4;
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if (bottomBlockY < maxBlockHeight) {
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if (engineMode == EngineMode.HIDE) {
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return switch (level.getWorld().getEnvironment()) {
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case NETHER -> presetBlockStatesNetherrack;
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case THE_END -> presetBlockStatesEndStone;
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default -> bottomBlockY < 0 ? presetBlockStatesDeepslate : presetBlockStatesStone;
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};
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}
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return presetBlockStates;
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}
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return null;
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}
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@Override
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public boolean shouldModify(ServerPlayer player, LevelChunk chunk) {
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return !usePermission || !player.getBukkitEntity().hasPermission("paper.antixray.bypass");
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}
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@Override
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public ChunkPacketInfoAntiXray getChunkPacketInfo(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk) {
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// Return a new instance to collect data and objects in the right state while creating the chunk packet for thread safe access later
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return new ChunkPacketInfoAntiXray(chunkPacket, chunk, this);
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}
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@Override
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public void modifyBlocks(ClientboundLevelChunkWithLightPacket chunkPacket, ChunkPacketInfo<BlockState> chunkPacketInfo) {
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if (!(chunkPacketInfo instanceof ChunkPacketInfoAntiXray)) {
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chunkPacket.setReady(true);
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return;
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}
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if (!Bukkit.isPrimaryThread()) {
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// Plugins?
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MinecraftServer.getServer().scheduleOnMain(() -> modifyBlocks(chunkPacket, chunkPacketInfo));
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return;
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}
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LevelChunk chunk = chunkPacketInfo.getChunk();
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int x = chunk.getPos().x;
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int z = chunk.getPos().z;
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Level level = chunk.getLevel();
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((ChunkPacketInfoAntiXray) chunkPacketInfo).setNearbyChunks(level.getChunkIfLoaded(x - 1, z), level.getChunkIfLoaded(x + 1, z), level.getChunkIfLoaded(x, z - 1), level.getChunkIfLoaded(x, z + 1));
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executor.execute((Runnable) chunkPacketInfo);
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}
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// Actually these fields should be variables inside the obfuscate method but in sync mode or with SingleThreadExecutor in async mode it's okay (even without ThreadLocal)
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// If an ExecutorService with multiple threads is used, ThreadLocal must be used here
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private final ThreadLocal<int[]> presetBlockStateBits = ThreadLocal.withInitial(() -> new int[getPresetBlockStatesFullLength()]);
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private static final ThreadLocal<boolean[]> SOLID = ThreadLocal.withInitial(() -> new boolean[Block.BLOCK_STATE_REGISTRY.size()]);
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private static final ThreadLocal<boolean[]> OBFUSCATE = ThreadLocal.withInitial(() -> new boolean[Block.BLOCK_STATE_REGISTRY.size()]);
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// These boolean arrays represent chunk layers, true means don't obfuscate, false means obfuscate
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private static final ThreadLocal<boolean[][]> CURRENT = ThreadLocal.withInitial(() -> new boolean[16][16]);
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private static final ThreadLocal<boolean[][]> NEXT = ThreadLocal.withInitial(() -> new boolean[16][16]);
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private static final ThreadLocal<boolean[][]> NEXT_NEXT = ThreadLocal.withInitial(() -> new boolean[16][16]);
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public void obfuscate(ChunkPacketInfoAntiXray chunkPacketInfoAntiXray) {
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int[] presetBlockStateBits = this.presetBlockStateBits.get();
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boolean[] solid = SOLID.get();
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boolean[] obfuscate = OBFUSCATE.get();
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boolean[][] current = CURRENT.get();
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boolean[][] next = NEXT.get();
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boolean[][] nextNext = NEXT_NEXT.get();
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// bitStorageReader, bitStorageWriter and nearbyChunkSections could also be reused (with ThreadLocal if necessary) but it's not worth it
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BitStorageReader bitStorageReader = new BitStorageReader();
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BitStorageWriter bitStorageWriter = new BitStorageWriter();
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LevelChunkSection[] nearbyChunkSections = new LevelChunkSection[4];
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LevelChunk chunk = chunkPacketInfoAntiXray.getChunk();
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Level level = chunk.getLevel();
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int maxChunkSectionIndex = Math.min((maxBlockHeight >> 4) - chunk.getMinSectionY(), chunk.getSectionsCount()) - 1;
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boolean[] solidTemp = null;
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boolean[] obfuscateTemp = null;
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bitStorageReader.setBuffer(chunkPacketInfoAntiXray.getBuffer());
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bitStorageWriter.setBuffer(chunkPacketInfoAntiXray.getBuffer());
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int numberOfBlocks = presetBlockStateBits.length;
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// Keep the lambda expressions as simple as possible. They are used very frequently.
|
||||
LayeredIntSupplier random = numberOfBlocks == 1 ? (() -> 0) : engineMode == EngineMode.OBFUSCATE_LAYER ? new LayeredIntSupplier() {
|
||||
// engine-mode: 3
|
||||
private int state;
|
||||
private int next;
|
||||
|
||||
{
|
||||
while ((state = ThreadLocalRandom.current().nextInt()) == 0) ;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void nextLayer() {
|
||||
// https://en.wikipedia.org/wiki/Xorshift
|
||||
state ^= state << 13;
|
||||
state ^= state >>> 17;
|
||||
state ^= state << 5;
|
||||
// https://www.pcg-random.org/posts/bounded-rands.html
|
||||
next = (int) ((Integer.toUnsignedLong(state) * numberOfBlocks) >>> 32);
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getAsInt() {
|
||||
return next;
|
||||
}
|
||||
} : new LayeredIntSupplier() {
|
||||
// engine-mode: 2
|
||||
private int state;
|
||||
|
||||
{
|
||||
while ((state = ThreadLocalRandom.current().nextInt()) == 0) ;
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getAsInt() {
|
||||
// https://en.wikipedia.org/wiki/Xorshift
|
||||
state ^= state << 13;
|
||||
state ^= state >>> 17;
|
||||
state ^= state << 5;
|
||||
// https://www.pcg-random.org/posts/bounded-rands.html
|
||||
return (int) ((Integer.toUnsignedLong(state) * numberOfBlocks) >>> 32);
|
||||
}
|
||||
};
|
||||
|
||||
for (int chunkSectionIndex = 0; chunkSectionIndex <= maxChunkSectionIndex; chunkSectionIndex++) {
|
||||
if (chunkPacketInfoAntiXray.isWritten(chunkSectionIndex) && chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex) != null) {
|
||||
int[] presetBlockStateBitsTemp;
|
||||
|
||||
if (chunkPacketInfoAntiXray.getPalette(chunkSectionIndex) instanceof GlobalPalette) {
|
||||
if (engineMode == EngineMode.HIDE) {
|
||||
presetBlockStateBitsTemp = switch (level.getWorld().getEnvironment()) {
|
||||
case NETHER -> presetBlockStateBitsNetherrackGlobal;
|
||||
case THE_END -> presetBlockStateBitsEndStoneGlobal;
|
||||
default -> chunkSectionIndex + chunk.getMinSectionY() < 0 ? presetBlockStateBitsDeepslateGlobal : presetBlockStateBitsStoneGlobal;
|
||||
};
|
||||
} else {
|
||||
presetBlockStateBitsTemp = presetBlockStateBitsGlobal;
|
||||
}
|
||||
} else {
|
||||
// If it's presetBlockStates, use this.presetBlockStatesFull instead
|
||||
BlockState[] presetBlockStatesFull = chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex) == presetBlockStates ? this.presetBlockStatesFull : chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex);
|
||||
presetBlockStateBitsTemp = presetBlockStateBits;
|
||||
|
||||
for (int i = 0; i < presetBlockStateBitsTemp.length; i++) {
|
||||
// This is thread safe because we only request IDs that are guaranteed to be in the palette and are visible
|
||||
// For more details see the comments in the readPalette method
|
||||
presetBlockStateBitsTemp[i] = chunkPacketInfoAntiXray.getPalette(chunkSectionIndex).idFor(presetBlockStatesFull[i]);
|
||||
}
|
||||
}
|
||||
|
||||
bitStorageWriter.setIndex(chunkPacketInfoAntiXray.getIndex(chunkSectionIndex));
|
||||
|
||||
// Check if the chunk section below was not obfuscated
|
||||
if (chunkSectionIndex == 0 || !chunkPacketInfoAntiXray.isWritten(chunkSectionIndex - 1) || chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex - 1) == null) {
|
||||
// If so, initialize some stuff
|
||||
bitStorageReader.setBits(chunkPacketInfoAntiXray.getBits(chunkSectionIndex));
|
||||
bitStorageReader.setIndex(chunkPacketInfoAntiXray.getIndex(chunkSectionIndex));
|
||||
solidTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex), solid, solidGlobal);
|
||||
obfuscateTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex), obfuscate, obfuscateGlobal);
|
||||
// Read the blocks of the upper layer of the chunk section below if it exists
|
||||
LevelChunkSection belowChunkSection = null;
|
||||
boolean skipFirstLayer = chunkSectionIndex == 0 || (belowChunkSection = chunk.getSections()[chunkSectionIndex - 1]) == EMPTY_SECTION;
|
||||
|
||||
for (int z = 0; z < 16; z++) {
|
||||
for (int x = 0; x < 16; x++) {
|
||||
current[z][x] = true;
|
||||
next[z][x] = skipFirstLayer || isTransparent(belowChunkSection, x, 15, z);
|
||||
}
|
||||
}
|
||||
|
||||
// Abuse the obfuscateLayer method to read the blocks of the first layer of the current chunk section
|
||||
bitStorageWriter.setBits(0);
|
||||
obfuscateLayer(-1, bitStorageReader, bitStorageWriter, solidTemp, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, emptyNearbyChunkSections, random);
|
||||
}
|
||||
|
||||
bitStorageWriter.setBits(chunkPacketInfoAntiXray.getBits(chunkSectionIndex));
|
||||
nearbyChunkSections[0] = chunkPacketInfoAntiXray.getNearbyChunks()[0] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[0].getSections()[chunkSectionIndex];
|
||||
nearbyChunkSections[1] = chunkPacketInfoAntiXray.getNearbyChunks()[1] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[1].getSections()[chunkSectionIndex];
|
||||
nearbyChunkSections[2] = chunkPacketInfoAntiXray.getNearbyChunks()[2] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[2].getSections()[chunkSectionIndex];
|
||||
nearbyChunkSections[3] = chunkPacketInfoAntiXray.getNearbyChunks()[3] == null ? EMPTY_SECTION : chunkPacketInfoAntiXray.getNearbyChunks()[3].getSections()[chunkSectionIndex];
|
||||
|
||||
// Obfuscate all layers of the current chunk section except the upper one
|
||||
for (int y = 0; y < 15; y++) {
|
||||
boolean[][] temp = current;
|
||||
current = next;
|
||||
next = nextNext;
|
||||
nextNext = temp;
|
||||
random.nextLayer();
|
||||
obfuscateLayer(y, bitStorageReader, bitStorageWriter, solidTemp, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, nearbyChunkSections, random);
|
||||
}
|
||||
|
||||
// Check if the chunk section above doesn't need obfuscation
|
||||
if (chunkSectionIndex == maxChunkSectionIndex || !chunkPacketInfoAntiXray.isWritten(chunkSectionIndex + 1) || chunkPacketInfoAntiXray.getPresetValues(chunkSectionIndex + 1) == null) {
|
||||
// If so, obfuscate the upper layer of the current chunk section by reading blocks of the first layer from the chunk section above if it exists
|
||||
LevelChunkSection aboveChunkSection;
|
||||
|
||||
if (chunkSectionIndex != chunk.getSectionsCount() - 1 && (aboveChunkSection = chunk.getSections()[chunkSectionIndex + 1]) != EMPTY_SECTION) {
|
||||
boolean[][] temp = current;
|
||||
current = next;
|
||||
next = nextNext;
|
||||
nextNext = temp;
|
||||
|
||||
for (int z = 0; z < 16; z++) {
|
||||
for (int x = 0; x < 16; x++) {
|
||||
if (isTransparent(aboveChunkSection, x, 0, z)) {
|
||||
current[z][x] = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// There is nothing to read anymore
|
||||
bitStorageReader.setBits(0);
|
||||
solid[0] = true;
|
||||
random.nextLayer();
|
||||
obfuscateLayer(15, bitStorageReader, bitStorageWriter, solid, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, nearbyChunkSections, random);
|
||||
}
|
||||
} else {
|
||||
// If not, initialize the reader and other stuff for the chunk section above to obfuscate the upper layer of the current chunk section
|
||||
bitStorageReader.setBits(chunkPacketInfoAntiXray.getBits(chunkSectionIndex + 1));
|
||||
bitStorageReader.setIndex(chunkPacketInfoAntiXray.getIndex(chunkSectionIndex + 1));
|
||||
solidTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex + 1), solid, solidGlobal);
|
||||
obfuscateTemp = readPalette(chunkPacketInfoAntiXray.getPalette(chunkSectionIndex + 1), obfuscate, obfuscateGlobal);
|
||||
boolean[][] temp = current;
|
||||
current = next;
|
||||
next = nextNext;
|
||||
nextNext = temp;
|
||||
random.nextLayer();
|
||||
obfuscateLayer(15, bitStorageReader, bitStorageWriter, solidTemp, obfuscateTemp, presetBlockStateBitsTemp, current, next, nextNext, nearbyChunkSections, random);
|
||||
}
|
||||
|
||||
bitStorageWriter.flush();
|
||||
}
|
||||
}
|
||||
|
||||
chunkPacketInfoAntiXray.getChunkPacket().setReady(true);
|
||||
}
|
||||
|
||||
private void obfuscateLayer(int y, BitStorageReader bitStorageReader, BitStorageWriter bitStorageWriter, boolean[] solid, boolean[] obfuscate, int[] presetBlockStateBits, boolean[][] current, boolean[][] next, boolean[][] nextNext, LevelChunkSection[] nearbyChunkSections, IntSupplier random) {
|
||||
// First block of first line
|
||||
int bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[0][0] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[0][1] = true;
|
||||
next[1][0] = true;
|
||||
} else {
|
||||
if (current[0][0] || isTransparent(nearbyChunkSections[2], 0, y, 15) || isTransparent(nearbyChunkSections[0], 15, y, 0)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[0][0] = true;
|
||||
}
|
||||
|
||||
// First line
|
||||
for (int x = 1; x < 15; x++) {
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[0][x] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[0][x - 1] = true;
|
||||
next[0][x + 1] = true;
|
||||
next[1][x] = true;
|
||||
} else {
|
||||
if (current[0][x] || isTransparent(nearbyChunkSections[2], x, y, 15)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[0][x] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Last block of first line
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[0][15] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[0][14] = true;
|
||||
next[1][15] = true;
|
||||
} else {
|
||||
if (current[0][15] || isTransparent(nearbyChunkSections[2], 15, y, 15) || isTransparent(nearbyChunkSections[1], 0, y, 0)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[0][15] = true;
|
||||
}
|
||||
|
||||
// All inner lines
|
||||
for (int z = 1; z < 15; z++) {
|
||||
// First block
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[z][0] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[z][1] = true;
|
||||
next[z - 1][0] = true;
|
||||
next[z + 1][0] = true;
|
||||
} else {
|
||||
if (current[z][0] || isTransparent(nearbyChunkSections[0], 15, y, z)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[z][0] = true;
|
||||
}
|
||||
|
||||
// All inner blocks
|
||||
for (int x = 1; x < 15; x++) {
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[z][x] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[z][x - 1] = true;
|
||||
next[z][x + 1] = true;
|
||||
next[z - 1][x] = true;
|
||||
next[z + 1][x] = true;
|
||||
} else {
|
||||
if (current[z][x]) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[z][x] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Last block
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[z][15] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[z][14] = true;
|
||||
next[z - 1][15] = true;
|
||||
next[z + 1][15] = true;
|
||||
} else {
|
||||
if (current[z][15] || isTransparent(nearbyChunkSections[1], 0, y, z)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[z][15] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// First block of last line
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[15][0] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[15][1] = true;
|
||||
next[14][0] = true;
|
||||
} else {
|
||||
if (current[15][0] || isTransparent(nearbyChunkSections[3], 0, y, 0) || isTransparent(nearbyChunkSections[0], 15, y, 15)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[15][0] = true;
|
||||
}
|
||||
|
||||
// Last line
|
||||
for (int x = 1; x < 15; x++) {
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[15][x] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[15][x - 1] = true;
|
||||
next[15][x + 1] = true;
|
||||
next[14][x] = true;
|
||||
} else {
|
||||
if (current[15][x] || isTransparent(nearbyChunkSections[3], x, y, 0)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[15][x] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Last block of last line
|
||||
bits = bitStorageReader.read();
|
||||
|
||||
if (nextNext[15][15] = !solid[bits]) {
|
||||
bitStorageWriter.skip();
|
||||
next[15][14] = true;
|
||||
next[14][15] = true;
|
||||
} else {
|
||||
if (current[15][15] || isTransparent(nearbyChunkSections[3], 15, y, 0) || isTransparent(nearbyChunkSections[1], 0, y, 15)) {
|
||||
bitStorageWriter.skip();
|
||||
} else {
|
||||
bitStorageWriter.write(presetBlockStateBits[random.getAsInt()]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!obfuscate[bits]) {
|
||||
next[15][15] = true;
|
||||
}
|
||||
}
|
||||
|
||||
private boolean isTransparent(LevelChunkSection chunkSection, int x, int y, int z) {
|
||||
if (chunkSection == EMPTY_SECTION) {
|
||||
return true;
|
||||
}
|
||||
|
||||
try {
|
||||
return !solidGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(chunkSection.getBlockState(x, y, z))];
|
||||
} catch (MissingPaletteEntryException e) {
|
||||
// Race condition / visibility issue / no happens-before relationship
|
||||
// We don't care and treat the block as transparent
|
||||
// Internal implementation details of PalettedContainer, LinearPalette, HashMapPalette, CrudeIncrementalIntIdentityHashBiMap, ... guarantee us that no (other) exceptions will occur
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
private boolean[] readPalette(Palette<BlockState> palette, boolean[] temp, boolean[] global) {
|
||||
if (palette instanceof GlobalPalette) {
|
||||
return global;
|
||||
}
|
||||
|
||||
try {
|
||||
for (int i = 0; i < palette.getSize(); i++) {
|
||||
temp[i] = global[GLOBAL_BLOCKSTATE_PALETTE.idFor(palette.valueFor(i))];
|
||||
}
|
||||
} catch (MissingPaletteEntryException e) {
|
||||
// Race condition / visibility issue / no happens-before relationship
|
||||
// We don't care because we at least see the state as it was when the chunk packet was created
|
||||
// Internal implementation details of PalettedContainer, LinearPalette, HashMapPalette, CrudeIncrementalIntIdentityHashBiMap, ... guarantee us that no (other) exceptions will occur until we have all the data that we need here
|
||||
// Since all palettes have a fixed initial maximum size and there is no internal restructuring and no values are removed from palettes, we are also guaranteed to see the data
|
||||
}
|
||||
|
||||
return temp;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onBlockChange(Level level, BlockPos blockPos, BlockState newBlockState, BlockState oldBlockState, int flags, int maxUpdateDepth) {
|
||||
if (oldBlockState != null && solidGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(oldBlockState)] && !solidGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(newBlockState)] && blockPos.getY() <= maxBlockHeightUpdatePosition) {
|
||||
updateNearbyBlocks(level, blockPos);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onPlayerLeftClickBlock(ServerPlayerGameMode serverPlayerGameMode, BlockPos blockPos, ServerboundPlayerActionPacket.Action action, Direction direction, int worldHeight, int sequence) {
|
||||
if (blockPos.getY() <= maxBlockHeightUpdatePosition) {
|
||||
updateNearbyBlocks(serverPlayerGameMode.level, blockPos);
|
||||
}
|
||||
}
|
||||
|
||||
private void updateNearbyBlocks(Level level, BlockPos blockPos) {
|
||||
if (updateRadius >= 2) {
|
||||
BlockPos temp = blockPos.west();
|
||||
updateBlock(level, temp);
|
||||
updateBlock(level, temp.west());
|
||||
updateBlock(level, temp.below());
|
||||
updateBlock(level, temp.above());
|
||||
updateBlock(level, temp.north());
|
||||
updateBlock(level, temp.south());
|
||||
updateBlock(level, temp = blockPos.east());
|
||||
updateBlock(level, temp.east());
|
||||
updateBlock(level, temp.below());
|
||||
updateBlock(level, temp.above());
|
||||
updateBlock(level, temp.north());
|
||||
updateBlock(level, temp.south());
|
||||
updateBlock(level, temp = blockPos.below());
|
||||
updateBlock(level, temp.below());
|
||||
updateBlock(level, temp.north());
|
||||
updateBlock(level, temp.south());
|
||||
updateBlock(level, temp = blockPos.above());
|
||||
updateBlock(level, temp.above());
|
||||
updateBlock(level, temp.north());
|
||||
updateBlock(level, temp.south());
|
||||
updateBlock(level, temp = blockPos.north());
|
||||
updateBlock(level, temp.north());
|
||||
updateBlock(level, temp = blockPos.south());
|
||||
updateBlock(level, temp.south());
|
||||
} else if (updateRadius == 1) {
|
||||
updateBlock(level, blockPos.west());
|
||||
updateBlock(level, blockPos.east());
|
||||
updateBlock(level, blockPos.below());
|
||||
updateBlock(level, blockPos.above());
|
||||
updateBlock(level, blockPos.north());
|
||||
updateBlock(level, blockPos.south());
|
||||
} else {
|
||||
// Do nothing if updateRadius <= 0 (test mode)
|
||||
}
|
||||
}
|
||||
|
||||
private void updateBlock(Level level, BlockPos blockPos) {
|
||||
BlockState blockState = level.getBlockStateIfLoaded(blockPos);
|
||||
|
||||
if (blockState != null && obfuscateGlobal[GLOBAL_BLOCKSTATE_PALETTE.idFor(blockState)]) {
|
||||
((ServerLevel) level).getChunkSource().blockChanged(blockPos);
|
||||
}
|
||||
}
|
||||
|
||||
@FunctionalInterface
|
||||
private interface LayeredIntSupplier extends IntSupplier {
|
||||
default void nextLayer() {
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,80 @@
|
||||
package io.papermc.paper.antixray;
|
||||
|
||||
import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
|
||||
import net.minecraft.world.level.chunk.LevelChunk;
|
||||
import net.minecraft.world.level.chunk.Palette;
|
||||
|
||||
public class ChunkPacketInfo<T> {
|
||||
|
||||
private final ClientboundLevelChunkWithLightPacket chunkPacket;
|
||||
private final LevelChunk chunk;
|
||||
private final int[] bits;
|
||||
private final Object[] palettes;
|
||||
private final int[] indexes;
|
||||
private final Object[][] presetValues;
|
||||
private byte[] buffer;
|
||||
|
||||
public ChunkPacketInfo(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk) {
|
||||
this.chunkPacket = chunkPacket;
|
||||
this.chunk = chunk;
|
||||
int sections = chunk.getSectionsCount();
|
||||
bits = new int[sections];
|
||||
palettes = new Object[sections];
|
||||
indexes = new int[sections];
|
||||
presetValues = new Object[sections][];
|
||||
}
|
||||
|
||||
public ClientboundLevelChunkWithLightPacket getChunkPacket() {
|
||||
return chunkPacket;
|
||||
}
|
||||
|
||||
public LevelChunk getChunk() {
|
||||
return chunk;
|
||||
}
|
||||
|
||||
public byte[] getBuffer() {
|
||||
return buffer;
|
||||
}
|
||||
|
||||
public void setBuffer(byte[] buffer) {
|
||||
this.buffer = buffer;
|
||||
}
|
||||
|
||||
public int getBits(int chunkSectionIndex) {
|
||||
return bits[chunkSectionIndex];
|
||||
}
|
||||
|
||||
public void setBits(int chunkSectionIndex, int bits) {
|
||||
this.bits[chunkSectionIndex] = bits;
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
public Palette<T> getPalette(int chunkSectionIndex) {
|
||||
return (Palette<T>) palettes[chunkSectionIndex];
|
||||
}
|
||||
|
||||
public void setPalette(int chunkSectionIndex, Palette<T> palette) {
|
||||
palettes[chunkSectionIndex] = palette;
|
||||
}
|
||||
|
||||
public int getIndex(int chunkSectionIndex) {
|
||||
return indexes[chunkSectionIndex];
|
||||
}
|
||||
|
||||
public void setIndex(int chunkSectionIndex, int index) {
|
||||
indexes[chunkSectionIndex] = index;
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
public T[] getPresetValues(int chunkSectionIndex) {
|
||||
return (T[]) presetValues[chunkSectionIndex];
|
||||
}
|
||||
|
||||
public void setPresetValues(int chunkSectionIndex, T[] presetValues) {
|
||||
this.presetValues[chunkSectionIndex] = presetValues;
|
||||
}
|
||||
|
||||
public boolean isWritten(int chunkSectionIndex) {
|
||||
return bits[chunkSectionIndex] != 0;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,29 @@
|
||||
package io.papermc.paper.antixray;
|
||||
|
||||
import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
|
||||
import net.minecraft.world.level.block.state.BlockState;
|
||||
import net.minecraft.world.level.chunk.LevelChunk;
|
||||
|
||||
public final class ChunkPacketInfoAntiXray extends ChunkPacketInfo<BlockState> implements Runnable {
|
||||
|
||||
private final ChunkPacketBlockControllerAntiXray chunkPacketBlockControllerAntiXray;
|
||||
private LevelChunk[] nearbyChunks;
|
||||
|
||||
public ChunkPacketInfoAntiXray(ClientboundLevelChunkWithLightPacket chunkPacket, LevelChunk chunk, ChunkPacketBlockControllerAntiXray chunkPacketBlockControllerAntiXray) {
|
||||
super(chunkPacket, chunk);
|
||||
this.chunkPacketBlockControllerAntiXray = chunkPacketBlockControllerAntiXray;
|
||||
}
|
||||
|
||||
public LevelChunk[] getNearbyChunks() {
|
||||
return nearbyChunks;
|
||||
}
|
||||
|
||||
public void setNearbyChunks(LevelChunk... nearbyChunks) {
|
||||
this.nearbyChunks = nearbyChunks;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
chunkPacketBlockControllerAntiXray.obfuscate(this);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user